An example of bad parenting?

The Star Online:
Saturday May 1, 2010
Toddler found drowned in fish tank
A 16-MONTH-OLD toddler was found drowned in an aquarium placed on the floor of her kitchen, reported Kosmo! Nurul Najwa Atika Robin Gantilan, who was under the care of her 12-year-old sister at their home in Muar at that time, was believed to have leaned over the tank to watch the fish when she fell in. Her mother Wan Nor Bahiyah Sabri, 35, was away at that time attending a Maulidur Rasul event at a school nearby while her father Robin Gantilan was working in a plantation. Upon returning from school with her two other children, Wan Nor Bahiyah had gone looking for Nurul Najwa after realising that she was not with her sister, who was sleeping alone in the living room. When she found Nurul Najwa face down at the bottom of the aquarium, she tried to resuscitate her but the toddler did not respond. Nurul Najwa died after being warded for five days in the Intensive Care Unit of the Muar Sultanah Fatimah Medical Centre.

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I know I'm not supposed to judge. Here is a case of Bad parenting! or to put it more diplomatically bad judgments and bad decisions.
Leaving a toddler in the care of a 12 yr old is just not something a parent should ever consider!
From the article I can assume the mom had to work and there was no babysitter to care for the kids. Therefore she left the baby with the oldest kid. I know being a parent is not easy but making snap decisions and finding the easiest way out will not make the problem go away.